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JPS5750157A - Frequency shift modulator - Google Patents

Frequency shift modulator

Info

Publication number
JPS5750157A
JPS5750157A JP12582580A JP12582580A JPS5750157A JP S5750157 A JPS5750157 A JP S5750157A JP 12582580 A JP12582580 A JP 12582580A JP 12582580 A JP12582580 A JP 12582580A JP S5750157 A JPS5750157 A JP S5750157A
Authority
JP
Japan
Prior art keywords
circuit
input terminal
terminal
output
shift register
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP12582580A
Other languages
Japanese (ja)
Other versions
JPS6053976B2 (en
Inventor
Hiroshi Hasegawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toa Corp
Toa Tokushu Denki KK
Original Assignee
Toa Electric Co Ltd
Toa Tokushu Denki KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toa Electric Co Ltd, Toa Tokushu Denki KK filed Critical Toa Electric Co Ltd
Priority to JP12582580A priority Critical patent/JPS6053976B2/en
Publication of JPS5750157A publication Critical patent/JPS5750157A/en
Publication of JPS6053976B2 publication Critical patent/JPS6053976B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2003—Modulator circuits; Transmitter circuits for continuous phase modulation
    • H04L27/2021—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change per symbol period is not constrained
    • H04L27/2025—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change per symbol period is not constrained in which the phase changes in a piecewise linear manner within each symbol period

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To enable to apply a digital modulating signal of asynchronism and to avoid phase shift at frequency shift with a simple constitution. CONSTITUTION:An output terminal Q1 of a shift register 2 is connected to a modulation output terminal 10 via a low pass filter 8, and output terminals Qn-1, Qn are connected to a logical circuit 12. The circuit 12 consists of an inverting input AND circuit 14, AND circuit 16 and OR circuit 18, and the output of an circuit 14 and the AND circuit 16 is connected to the input of the OR circuit 18. One input terminal 20 of the inverting input AND circuit 14 is connected to the output terminal Qn-1 of the shift register 2, and another input terminal 22 is connected to a modulation signal input terminal 24 where a digital modulation signal 21 is applied. One input terminal of the AND circuit 16 is an inverting input terminal 28, this terminal is connected to the output terminal Qn of the shift register 2, and another input terminal 26 is connected to the modulation input terminal 24. The output of the OR circuit 18 is connected to a data input terminal 30 of the shift register 2.
JP12582580A 1980-09-10 1980-09-10 frequency shift modulator Expired JPS6053976B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12582580A JPS6053976B2 (en) 1980-09-10 1980-09-10 frequency shift modulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12582580A JPS6053976B2 (en) 1980-09-10 1980-09-10 frequency shift modulator

Publications (2)

Publication Number Publication Date
JPS5750157A true JPS5750157A (en) 1982-03-24
JPS6053976B2 JPS6053976B2 (en) 1985-11-28

Family

ID=14919866

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12582580A Expired JPS6053976B2 (en) 1980-09-10 1980-09-10 frequency shift modulator

Country Status (1)

Country Link
JP (1) JPS6053976B2 (en)

Also Published As

Publication number Publication date
JPS6053976B2 (en) 1985-11-28

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